# File: json-ex.py
# Program to read in JSON data,
# parse it, and print it out in
# several ways; also, how to access it
#
# Matt Bishop, MHI 289I, Fall 2021

# JSON module
import json

#
# open the file using with
#
with open("example.json") as jf:
    jfinp = jf.read()

# now print out the contents directly
print('Here is the JSON in the file:')
print(jfinp)

# wait for the user to indicate you can go on
print("---------------------------")
x = input("Press return to continue")
            
# now save it as a dictionary
print('Now we decode it;', end=" ")
jfdict = json.loads(jfinp)
print('its type is', type(jfdict))
print(jfdict)

# wait for the user to indicate you can go on
print("---------------------------")
x = input("Press return to continue")

# now save it as a string
print('Now we dump it;', end=" ")
jfdump = json.dumps(jfdict)
print('its type is', type(jfdump))
print(jfdump)

# wait for the user to indicate you can go on
print("---------------------------")
x = input("Press return to continue")
            
# let's see what's there -- access elements
# this *depends* on the file being example.json
print('Key is glossary')
print(jfdict["glossary"])
print('Key is glossary:title')
print(jfdict["glossary"]["title"])
print(jfdict["glossary"]["GlossDiv"])

# wait for the user to indicate you can go on
print("---------------------------")
x = input("Press return to continue")

# prettyprint it with an indentation of 4 spaces for each level
# separate the keys from the values by ": " and the (key, value)
# pairs with ","
print('Now we prettyprint it')
print(json.dumps(jfdict, indent=2, separators=("---", "! ")))
                 
# wait for the user to indicate you can go on
print("---------------------------")
x = input("Press return to continue")
            
# as before, but separate the keys from the values by " -- "
print('Now we prettyprint it another way')
print(json.dumps(jfdict, indent=4, separators=(",", " -- ")))